Public Enum GradientStyle 
   Inherits System.Enum

Dim instance As GradientStyle

public enum GradientStyle : System.Enum 

FarPoint.Web.Chart.AreaSeries aseries = new FarPoint.Web.Chart.AreaSeries();
aseries.SeriesName = "Series1";
aseries.Values.Add(2);
aseries.Values.Add(4);
aseries.Values.Add(3);
aseries.Values.Add(5);
aseries.AreaFill = new FarPoint.Web.Chart.GradientFill(System.Drawing.Color.Azure, System.Drawing.Color.Bisque);
FarPoint.Web.Chart.AreaSeries aseries1 = new FarPoint.Web.Chart.AreaSeries();
aseries1.SeriesName = "Series2";
aseries1.Values.Add(1);
aseries1.Values.Add(2);
aseries1.Values.Add(4);
aseries1.Values.Add(8);
aseries1.AreaFill = new FarPoint.Web.Chart.GradientFill(System.Drawing.Color.Azure, System.Drawing.Color.Bisque);
aseries.AreaBorder = new FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Blue);
// OR
//aseries1.AreaFill = new FarPoint.Web.Chart.GradientFill(System.Drawing.Color.Azure, System.Drawing.Color.Bisque, FarPoint.Web.Chart.GradientStyle.ForwardDiagonal);
//aseries.AreaBorder = new FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Blue, 2);

//aseries1.AreaFills.Add(new FarPoint.Web.Chart.SolidFill(System.Drawing.Color.LightGreen));
//aseries1.AreaBorders.AddRange(new FarPoint.Web.Chart.Line[] { new FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Black), new
FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Red), new FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Aqua), null
});
FarPoint.Web.Chart.YPlotArea plotArea = new FarPoint.Web.Chart.YPlotArea();
plotArea.Location = new System.Drawing.PointF(0.2F, 0.2F);
plotArea.Size = new System.Drawing.SizeF(0.6F, 0.6F);
plotArea.Series.Add(aseries);
plotArea.Series.Add(aseries1);
FarPoint.Web.Chart.LabelArea Label = new FarPoint.Web.Chart.LabelArea();
Label.Text = "Area Chart";
Label.Location = new System.Drawing.PointF(0.5F, 0.02F);
FarPoint.Web.Chart.LegendArea legend = new FarPoint.Web.Chart.LegendArea();
legend.Location = new System.Drawing.PointF(0.80F, 0.5F);
FarPoint.Web.Chart.ChartModel model = new FarPoint.Web.Chart.ChartModel();
model.LabelAreas.Add(Label);
model.LegendAreas.Add(legend);
model.PlotAreas.Add(plotArea);
FarPoint.Web.Spread.Chart.SpreadChart chart = new FarPoint.Web.Spread.Chart.SpreadChart();
chart.Model = model;
FpSpread1.Sheets[0].Charts.Add(chart);

Dim aseries As New FarPoint.Web.Chart.AreaSeries
aseries.SeriesName = "Series1"
aseries.Values.Add(2.0)
aseries.Values.Add(4.0)
aseries.Values.Add(3.0)
aseries.Values.Add(5.0)
aseries.AreaFill = New FarPoint.Web.Chart.GradientFill(System.Drawing.Color.Azure, System.Drawing.Color.Bisque)

Dim aseries1 As New FarPoint.Web.Chart.AreaSeries
aseries1.SeriesName = "Series2"
aseries1.Values.Add(1.0)
aseries1.Values.Add(2.0)
aseries1.Values.Add(4.0)
aseries1.Values.Add(8.0)
aseries1.AreaFill = New FarPoint.Web.Chart.GradientFill(System.Drawing.Color.Azure, System.Drawing.Color.Bisque)
aseries.AreaBorder = New FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Blue)
' OR
'aseries1.AreaFill = New FarPoint.Web.Chart.GradientFill(System.Drawing.Color.Azure, System.Drawing.Color.Bisque, FarPoint.Web.Chart.GradientStyle.ForwardDiagonal)
'aseries.AreaBorder = New FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Blue, 2)

'aseries1.AreaFills.Add(New FarPoint.Web.Chart.SolidFill(System.Drawing.Color.LightGreen))
'aseries1.AreaBorders.AddRange(New FarPoint.Web.Chart.Line() {New FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Black), New FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Red), New FarPoint.Web.Chart.SolidLine(System.Drawing.Color.Aqua), Nothing})

Dim plotArea As New FarPoint.Web.Chart.YPlotArea()
plotArea.Location = New System.Drawing.PointF(0.2F, 0.2F)
plotArea.Size = New System.Drawing.SizeF(0.6F, 0.6F)
plotArea.series.Add(aseries)
plotArea.series.Add(aseries1)

Dim Label As New FarPoint.Web.Chart.LabelArea()
Label.Text = "Area Chart"
Label.Location = New System.Drawing.PointF(0.5F, 0.02F)
Label.AlignmentX = 0.5F
Label.AlignmentY = 0.0F

Dim legend As New FarPoint.Web.Chart.LegendArea()
legend.Location = New System.Drawing.PointF(0.98F, 0.5F)
legend.AlignmentX = 1.0F
legend.AlignmentY = 0.5F

Dim model As New FarPoint.Web.Chart.ChartModel()
model.LabelAreas.Add(Label)
model.LegendAreas.Add(legend)
model.PlotAreas.Add(plotArea)
Dim chart As New FarPoint.Web.Spread.Chart.SpreadChart()
chart.Model = model
FpSpread1.Sheets(0).Charts.Add(chart)